Title :
Reducing cogging torque by adopting isodiametric permanent magnet
Author :
Yang, Yubo ; Wang, Xiuhe ; Zhu, Changqing ; Huang, Chuanzhen
Author_Institution :
Shandong Univ., Jinan
Abstract :
In this paper, being based on Fourier expansion and energy method, the analytical expression of cogging torque of permanent magnet(PM) motor is derived, which can be used to analyze the effects of design parameters on cogging torque. Then a new method for reducing cogging torque by adopting isodiametric magnetic pole is proposed. Finite element analysis is used to calculate the cogging torque and flux per pole for different shapes of magnetic pole. It is proved that the cogging torque could be greatly reduced by adopting isodiametric magnetic pole, while the flux per pole changes little, which verifies the effectiveness of the proposed method.
Keywords :
finite element analysis; permanent magnet motors; torque; Fourier expansion; adopting isodiametric magnetic pole; analytical expression; cogging torque; energy method; finite element analysis; isodiametric permanent magnet; permanent magnet motor; Finite element methods; Forging; Magnetic analysis; Magnetic flux; Magnetostatics; Permanent magnet motors; Permanent magnets; Rotors; Shape; Torque; cogging toque; isodiametric; permanent magnet motors;
Conference_Titel :
Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4244-2799-4
Electronic_ISBN :
978-1-4244-2800-7
DOI :
10.1109/ICIEA.2009.5138357
